this is not a atv question its a question a bout my 2000 Jeep Grand Cherokee. when i do oil changes on it i pull the filler cap off and it has that white sludge. Its moisture Im guessing but why? The local auto store told me to change my pcv valve don that no change. It has a 4.7 liter V8. I use 5/30 penzoil. i also change oil every 3000 Nobody else knows and I figured somebody here may know. Thank you in advance for your replies.:dunno: